自定义圆角ImageView方案1,去锯齿
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import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.RectF;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.ImageView;
/**
* 自定义的圆角矩形ImageView,可以直接当组件在布局中使用。
* @author zxj
*
*/
public class XHRoundImageView extends ImageView{
private Paint paint;
private int radius=60;
public int getRadius() {
return radius;
}
public void setRadius(int radius) {
this.radius = radius;
}
public XHRoundImageView(Context context) {
this(context,null);
}
public XHRoundImageView(Context context, AttributeSet attrs) {
this(context, attrs,0);
}
public XHRoundImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
paint = new Paint();
}
/**
* 绘制圆角矩形图片
*
*/
@Override
protected void onDraw(Canvas canvas) {
Drawable drawable = getDrawable();
if (null != drawable) {
Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();
bitmap=getScaleBitmap(bitmap,this.getWidth(),this.getHeight());
Bitmap b = getRoundBitmap(bitmap, radius);
final Rect rectSrc = new Rect(0, 0,b.getWidth(),b.getHeight());
final Rect rectDest = new Rect(0,0,getWidth(),getHeight());
paint.reset();
canvas.drawBitmap(b, rectSrc, rectDest, paint);
} else {
super.onDraw(canvas);
}
}
/**
* 获取圆角矩形图片方法
* @param bitmap
* @param roundPx,
* @return Bitmap
* @author
*/
private Bitmap getRoundBitmap(Bitmap bitmap, int roundPx) {
Bitmap output = Bitmap.createBitmap(this.getWidth(),
this.getHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(output);
final int color = 0xff424242;
final Rect rect = new Rect(0, 0, this.getWidth(), this.getHeight());
final RectF rectF = new RectF(rect);
paint.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(color);
int x = bitmap.getWidth();
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(bitmap, rect, rect, paint);
return output;
}
private static Bitmap getScaleBitmap(Bitmap bitmap,float scalex,float scaley) {
int width=bitmap.getWidth();
int height=bitmap.getHeight();
Matrix matrix = new Matrix();
matrix.postScale((float)scalex/width,(float)scaley/height); //长和宽放大缩小的比例
Bitmap resizeBmp = Bitmap.createBitmap(bitmap,0,0,bitmap.getWidth(),bitmap.getHeight(),matrix,true);
return resizeBmp;
}
}
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.RectF;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.ImageView;
/**
* 自定义的圆角矩形ImageView,可以直接当组件在布局中使用。
* @author zxj
*
*/
public class XHRoundImageView extends ImageView{
private Paint paint;
private int radius=60;
public int getRadius() {
return radius;
}
public void setRadius(int radius) {
this.radius = radius;
}
public XHRoundImageView(Context context) {
this(context,null);
}
public XHRoundImageView(Context context, AttributeSet attrs) {
this(context, attrs,0);
}
public XHRoundImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
paint = new Paint();
}
/**
* 绘制圆角矩形图片
*
*/
@Override
protected void onDraw(Canvas canvas) {
Drawable drawable = getDrawable();
if (null != drawable) {
Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();
bitmap=getScaleBitmap(bitmap,this.getWidth(),this.getHeight());
Bitmap b = getRoundBitmap(bitmap, radius);
final Rect rectSrc = new Rect(0, 0,b.getWidth(),b.getHeight());
final Rect rectDest = new Rect(0,0,getWidth(),getHeight());
paint.reset();
canvas.drawBitmap(b, rectSrc, rectDest, paint);
} else {
super.onDraw(canvas);
}
}
/**
* 获取圆角矩形图片方法
* @param bitmap
* @param roundPx,
* @return Bitmap
* @author
*/
private Bitmap getRoundBitmap(Bitmap bitmap, int roundPx) {
Bitmap output = Bitmap.createBitmap(this.getWidth(),
this.getHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(output);
final int color = 0xff424242;
final Rect rect = new Rect(0, 0, this.getWidth(), this.getHeight());
final RectF rectF = new RectF(rect);
paint.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(color);
int x = bitmap.getWidth();
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(bitmap, rect, rect, paint);
return output;
}
private static Bitmap getScaleBitmap(Bitmap bitmap,float scalex,float scaley) {
int width=bitmap.getWidth();
int height=bitmap.getHeight();
Matrix matrix = new Matrix();
matrix.postScale((float)scalex/width,(float)scaley/height); //长和宽放大缩小的比例
Bitmap resizeBmp = Bitmap.createBitmap(bitmap,0,0,bitmap.getWidth(),bitmap.getHeight(),matrix,true);
return resizeBmp;
}
}
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